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| Analysis and Optimization of Vehicle Shudder Caused by Engine Excitation |
| DOI：10.13949/j.cnki.nrjgc.2022.03.009 |
| Key Words:internal combustion engine longitudinal shudder transmission system mode torsional stiffness damping |
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| Abstract:In order to solve the longitudinal vibration problem occurred during acceleration by little throttle of a multi-purpose vehicle（MPV）， researches were done on the influence of engine excitation and ness transmission torsional vibration characteristics on vehicle transient acceleration ride comfort， and optimization methods were put forward. A longitudinal vibration coupling model of the whole vehicle transmission system was built， which contained the actual engine working load and throttle signal as the system excitation. The calculation results showed that the vibration was generated by the torsional mode of the transmission system rigid body excited by the transient change of torque. The contribution of key parameters was analyzed. The schemes of clutch damping， stiffness optimization and half shaft torsional stiffness improvement were put forward from the perspective of hardware. At the same time， the scheme of electronic control unit（ECU） torque filtering was proposed from the perspective of software control strategy with the performance of power， fuel consumption and ride comfort comprehensively balanced. The torque output became smoother and the shudder feeling was reduced by adjusting the filtering parameters. The optimization schemes were verified by tests to be effective in improving the acceleration longitudinal ride performance of the whole vehicle. |
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